package filters;

import java.io.IOException;
import java.util.Date;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;

/**
 * Servlet Filter implementation class AccessLogFilter
 */
@WebFilter("/AccessLogFilter")
public class AccessLogFilter implements Filter {

	private FilterConfig config;

	/**
	 * Default constructor.
	 */
	public AccessLogFilter() {
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {

		String filterName = config.getFilterName();
		HttpServletRequest req = (HttpServletRequest) request;
		ServletContext context = config.getServletContext();

		context.log(new Date() + ": " + "Access to: " + req.getRequestURI()
				+ " requested by: " + req.getRemoteHost() + ". (Reported by " + filterName + ".)");

		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		this.config= fConfig;
	}

}
